How to turn off a warning for one line of code.

[Carlo Wood]

| --- debug.hpp
| #ifdef DEBUG
|     #define PDBUG cout __FILE__   << ":" __LINE__ <<
|     // Its actually a lot more complicated than this but you get the
| idea.
| #else
|     #define PDBUG false && cout
|     // used to be able to #define PDBUG /##/ but egcs won't let me. :-(
| #endif // DEBUG
| 
| --- test.cpp
| #include "debug.hpp"
| PDBUG << "My error message..." << endl;
| 
| Now this code generates warnings that say:
|     warning: statement with no effect
| every time I used PDBUG with debugging turned off. That's a LOT of
| places!

Maybe an idea, I use this:

Debug( "My error message..." << endl; )

Where either

#define Debug(x)

or

#define Debug(x) cerr << x

...

Now I think of it, why don't you use

#define PDBUG if(0)cout

That doesn't give a warning.  Of course you'll need optimisation
to get rid of the test for 0.

-- 
 Carlo Wood  <carlo@runaway.xs4all.nl>